What is a characteristic sign of a concussion?

A characteristic sign of a concussion is confusion and headaches. Concussions are a type of traumatic brain injury that can occur after a blow to the head or body, resulting in various physical and cognitive symptoms. Confusion is a common indicator that the brain has been affected, as it can impair an individual’s ability to think clearly or respond appropriately. Headaches are also prevalent following a concussion due to the impact on the brain's tissues and structures, often leading to feelings of pressure or discomfort.

The other options represent symptoms associated with different medical conditions. Fever and nausea are typically linked to infections or illnesses, while rash and swelling suggest allergic reactions or infections affecting the skin. Shortness of breath often indicates respiratory issues or cardiac problems and is not directly related to concussions. Understanding these distinguishing symptoms is crucial for recognizing and responding to concussions effectively.